Antislipping device for resilient tires.



0'. A. TRANA. ANTISLIPPING DEVICE FOR RESILIBNT TIRES.

APPLICATION FILED JAN BI, 1910. v

Patented June 13, 1911.

, allel side iii 'rns

ONE-HALF TO WILLIAM J.

WESTPHAL, OF ST. PAUL, MINNESOTA.

Specification of Letters Patent.

' ANTISLIPPING DEVICE FOR RESILIENT TIRES.

' Application filed January 31, 1910. Serial No. 540,941.

To all whom it may concern: Be it known-that I, OLE A. TRANA, a Cli31- zen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and useful Improvement in Antislipping Dev ces for Resilient Tires, of which the following is a specification. I

This invention relates to improvements in antislipping attachments for tires of vehicles and more particularly is adapted for use upon pneumatic or cushioned tires.

The-primary object of this invention is to provide improved means which eanbe easily and quickly applied to the traction or driving wheels of automobiles by anyone skilled or unskilled when needed, and which will effectively prevent slipping of the tires upon smooth, wet and icy pavements or muddy roads.

A further object is to provide means for accomplishing the results above stated without unduly wearing the surface of the tires and which will protect the surface of the the from puncture or abrasion when in use.

With these and other objects in view my invention comprises strong, durable and inexpensive construction which is simple and notliable to disorder.

I am aware that prior to my invention antislipping attachments for pneumatic tires have been used which are composed of parchains disposed lengthwise of the tire and a plurality of cross chains secured to said side chains andpassed back and forth across the tires at suitable intervals. I. am also aware that the cross chains mentioned have been provided with cups, the intention, by the use of which is to-provide a gripping member which will more effectively impinge upon the pavement. These constructions are ineffective andineflicient and do not accomplish the results desired. In the first place the chain construction cuts into and wears the tire and in the cup construction the gripping member is not self cleaning, wears the tire, slips, and in consequence clogs, and renders the device detrimental. In the present invention gripping members are employed each of which is formed by a concave plate fitting over the tire and forming a suction connection when in use, said plate being provided with flanges set at angles which effectively bite into the avement, prevent lateral movement 0 the devices of metal or other suitable transverse curve of the wheel and at thesame time cleans the plate of any mud or ice that may tend to adhere upon its surface.

In the accompanying drawings forming part of this specification, Figure 1 is a side elevation of a'pneumatic tire and a wheel with an antislipping attachment applied thereto embodying the features of this invention; Fig. 2 1s a cross section ofa portion of Fig. 1 taken upon the line XX.; Fig. 3 is an enlarged fragmentary top plan view of the antislipping attachment when removed; F ig. 4 is a longitudinal section of one of the shoes or gripping elements taken upon the'lineY-Y of Fig. 3, and Fig. 5 is a perspective view enlarged, of the locking element for securing the ends of the longitudinal chains together.

In the practice of this invention a pair of circumferential elements preferably although not necessarily in the form of fieXi1 ble chains 2 and 3 or cables are arranged on opposite sides of the pneumatic tire A immediately adjoining the rim B of the wheel C the ends of each chain being securedtogether by a locking element D in the form' of a hook, one end of which is formed with an eye 4 secured to an end link 5 of a chain and the other end of the locking element being hooked through the link 6 on the opposite end of said chain, the hook portion 7 of the lock being turned back and formed with an extension 8 which may be used as a handle. In use. this handle is thrust through the link 6 and turnedback into the position illustrated in Fig. 5 thus drawing the chain tightly in place upon the wheeland tending to hold the ends of the chain in said position Without danger of separating.

Disposed at suitable and preferably regular intervals upon the periphery of the tire A are a plurality of my improved gripping E each of whihh is in theform of a This shoe consists of a thin plate 9 material which is concaved laterally and longitudinally for the purpose of forming a suction attachment on the surface of the tire, the radius of the longitudinal curve of said shoe being less than the radiusof the periphery of "the tire onwhich it is used. The radius of the shoe is approximately the same as or less than the radius of the curve of the tire in shoe.

- Patented June 13, 1911.

cross section. The

longitudinal end I portions of the shoe are the side'chains being formed with upturned flanges 10, 1'1, 12 and 17. The loops 15 Each fastener as illustrated consists ofa singlepiece of wire bent midway between its ends into elongated eyelets 16. The ends of this wire are brought together and form a shank 18 the outer extremity of which is fastened to a link of the side chains through eyes 19. The shank 18 bows outwardly to substantially conform with the surface of the tire as illustrated in Fig 2. The fasteners 17 thus form rigid connections between the shoes and the chains,'such connections being permissible and advantageous on account of the'suction engagement between the shoe and the surface of the tire. The side chains 2 and 3 are flexibleand permit a limited amount of movement of the shoes and their fasteners and the joint between the fasteners and the shoe being hinged as illustrated also permits the requisite amount of movement due to the weight of the superimposed load on.thetire.

In assembling this apparatus upon .a wheel or' tire, the tire need not be deflated tightly drawn inplace andheld securely by the fasteners D with the shoes disposed over the perimeter of the tire as illustrated in Fig. 1. The'angle at which the flanges 10 and 11 are disposed is the most eflicient and efle'ctivefor produc ing a grip "whichwill assist, in preventing .the wheel from slipping either longitudinally or transversely and the open spaces left between the forward and side ends of the fl'angescauses the shoe to clean and rid itself of any earth, ice or snow that may tend to adhere vention.

In accordance with have described the principles of operation of my invention together. with the appathrough elongated thereto and'prevent the eflicient and effective operation of the in-.

the patent statutes I ratus which I now consider to represent the best embodimentthereof but I desire to have it understood that the construction shown is only illustrative and that the invention can be carried out by other means and applied to. uses other than those above set forth within the scope of thefollowing claims.

Having described my invention, what I claim as new and desire to protect by Letters Patent is i l 1. An antislipping device for resilient tires, comprising, circumferentml side'chains,

a plurality of shoes disposed at intervals between said side chains and connections between said chains and shoes, each of said shoes consisting of a plate having upturned flanges formed at an oblique angle to the plane of. the wheel and spaced apart at the forward and rearward edges of the plate tov form a clearance passageway.-

2.'.An antislipping device for resilient tires, comprising, a pair of parallel side chains spaced apart, a plurality of shoes disposed at longitudinal intervals between said chains and attached thereto, each shoe consisting of a concave plate with its concavity turned down over the periphery of the, tire, said plate having flanges turned up therefrom at an oblique angle to the plane of the wheel, said upturned oblique edges being truncated to form an open end at the two ends of said shoes, the sides of said shoe being formed with a hinged connection, and

and hinged to said shoe.

3. An antislipping device for resilient a shoe plate of octagonalthereof which are at an oblique angle to'the plane of the wheel being tires, comprising, shape, those edges upturned at a right angle to form gripping flanges, and those opposite edges-of which are parallel to the plane of said wheel be ing formed with engaging loops, a pair a pair of fastenerssecu'red to said side chains side .chains between which said shoe plate is disposed and connections onsaid shoe and side chains. I

In testimony whereof, I have signedmy name to this specification in the presence of two subscribing witnesses;

OLE A. TRANA.

lVitnesses: v JULE DONOVAN,

F. G. BRADBURY.

between said loops 

